Black_05f150

Well for one turbos are for low rpm for pulling and having really good low rpm hp. But supercharges are for high rpm in which you want if your racing in which it sounds like it if your getting a long travel. So they do the same thing but for different purposes
There you go don't get so heated about I'm just trying to help get a cheaper solution than twin turbos

shadowrider

You have that completely backwards. Turbos like the ones he is using won't spool on a tiny 5.4L until around 4500rpms. A whipple is instant boost. Turbos for racing supercharger for pulling.

WarSurfer

You are both over-generalizing. Turbos have been used for both towing and top end, as have superchargers. It's all in how the total system is designed - Eco with twins tows like a diesel, GTR with twins hauls the mail but not much else.

Understanding that either method, turbo or supercharger, can be tailored for any number of uses it comes down to benefits and negatives of each based on how it will be used.

Turbos are much better for this type application because:

1) no parasitic power loss means either more power at the same boost or same power at lower boost - which is much better for managing detonation in an off road, all out environment.
2) turbos (and centris for that matter) have the added benefit of a large FMIC which makes managing heat (limiting detonation potential) easier.
3) turbos can be remote mounted to reduce under hood temperatures - again ability to manage heat/detonation potential.

D94R

Unless the cylinders in the block are in bad shape don't bore them, or bore them as little as possible to fit the new forged pistons (that you size accordingly). Boring a block is not a power modification. It's for fixing worn or damaged sleeves. Stroking the engine is where the power increases are made.

When you hear ppl say its bored and stroked, the bored part means squat other than they had to fix or clean up the cylinder walls.

shadowrider

You know nothing about engines apparently. A 5.4L has a huge stroke stock but extremely small bores. Boring it .020 over will really net you nothing in a NA trim but with FI it makes a big difference. Increasing the bore to 3.700 with sleeves will net you more hp and tq then a longer storke both NA and FI. Increasing the stroke on the already extremely long 4.165 will cause the pistons to rock at the top of the cylinder making the cylinder oval shaped over time and decreasing engine life.

D94R

You, are a dumbass.

5.4 for evar

So F1, NASCAR, V8 supercars, all those engine builders are wrong? And you sir, you know more than them? Highly probable.

High horsepower high RPM engines run large bores and small strokes. Keeps the piston speed down, over 72 ft. per second and things start to get all bendy inside. Not a good thing. So hence the large 3-4 inch or so bore of V8 supercars and the less than 2 inch stroke. So they can sing at 7-9k RPM all day and never wear out. If the OP never wants to see some screamin RPM I wouldn't do a thing to the block.

OH, and or the turbo vs. supercharger debate? Lets not forget heat soak with the super's. Go turbo.

Tradesman

Stave Lake in Mission, brother. That's where to go. And when you're done let me know, I'd like to swing by and check your beast out!

I don't know half as much about engine technology as you or the other person you are at a flame war with, but why would anyone recommend keeping the stock displacement instead of boring it out to 6.0L - 6.2L if you plan to use a supercharger? Could you not increase the displacement and run more boost to bring more power or am I missing something? Not trying to sound like a dumb ***, just a realistic question.

5.4 for evar

Personally I wouldn't bother with it. If I was going to bore I would bore it out, de-stroke it, deck the heads, and run less boost with more compression. So rather than 800hp at 26 psi, have 800 hp at 10 psi. Everything lasts longer, boost tubes don't blow off, all bunches of good stuff. Plus I would imagine that having 500 hp off boost would be better than 300 off boost. More responsive. Just my .02 cents tho.. I look at things differently than most coming from working on **** everyday and seeing how little it takes to blow stuff completely sky high. Alot of people think that low compresson high boost is the only way to go. I would never do that.

I think it was Hot Rod magazine that did a comparo with a 8.5:1 350 at 22 psi and it made 575 hp. Then they had a 10.5:1 350 at 12 psi and made 625. IIRC.... Of course, its all in the tune.

Infidel4life11

mitch I'm pretty sure this a 2v headed motor and not the 3v thats currently in the truck. Don't know if that matters to you and last I checked Trick flow didn't make a 3v head. I think the project is pretty sick good luck.